Prognostic Charts

current

12-h forecast

24-h forecast

36-h forecast

48-h forecast

Precipitation Areas
Areas of precipitation expected at the valid time of the forecast are outlined in green. Shading within these lines, or lack of shading, indicates the expected coverage (not intensity) of precipitation. Examples:

Precipitation Symbols

Surface Fronts

In addition to High and Low centers, you may see one or more of these eight features on a surface analysis or forecast:

Key to Features
1 -- Cold Front
2 -- Warm Front
3 -- Stationary Front
4 -- Occluded Front
5 -- Trough ("TROF")
      Also used to depict Outflow Boundry ("OUTFLO BNDRY")
6 -- Squall Line
7 -- Dry Line
8 -- Tropical Wave ("TRPCL WAVE")